On Sunday's episode of "Keeping Up With the Kardashians," sisters Kim, Kourtney and Khloe all had babies on the brain. Kourtney, who was still pregnant with daughter Penelope at the time, was already talking to boyfriend Scott Disick about having more children.

"I need to see what it's like when I have two, but [having kids] is what life is about," Kourtney, 33, explained. "I'm not going on the pill [after giving birth to Penelope]. I don't believe in it anymore!"

Meanwhile, Kim, 31, accompanied Khloe, 28, on a visit to a fertility specialist as her younger sister investigates why she still hasn't conceived with husband Lamar Odom. For moral support during the visit, Kim decided to test her own fertility and looked into the possibility of freezing her eggs -- with both siblings getting ultrasounds and blood work at the clinic.

Kim learned that she is fine and could begin freezing her eggs. "I'm 31, and I'll be 32 this year, and as young as I feel, I still have those feelings where I can't wait for the day when I have my own kids," Kim said. "It'll be exciting when that happens." Khloe, however, found out that she didn't ovulate that month -- meaning one more month's delay before a possible pregnancy.

"I'm not a big crier," Khloe tweeted during the show Sunday. "So I'm not too excited about what's coming up. Might have to stop watching. Sometimes hate reliving tough emotions."

On a lighter note during the E! reality show, momager Kris Jenner, 56, got her second breast enhancement surgery. "I can't believe that I'm sitting here, going through porn magazines so I can find the perfect pair of knockers," she joked. After her surgery, Kris decides to invite the family over to see her new breasts.